Andeew laundby



(-No Model.)

A. LAUNDRY. DIE FOR MAKI G- AUGBRS;

No. 382,710. Patented May 15, 1888 UNITED STATES I PATENT ()FFICIEQ ANDREW LAU DRY, or coTE sr. PAUL, QUEBEC, oANADA, ASSIGNOR or ONE-HALF TO HENRY HARRISON WARREN, or MAssENA, NEW YoRn.

DIE FOR MAKING AUGERS.

SPECIFICATION forming part of Letters Patent No'. 382,710, dated May 15, 1888. Application filed February 6, 1888. Serial No. 263,186. (No model.)

' To all whom it'nwy concern: w Be it known that I, ANDREW LAUNDRY, subject of the Queen of Great Britain, residing at Cote St. Paul, in the district of Montreal and Province of Quebec, Canada, have invented new and useful Improvements in Mechanism forv Manufacturing Angers; and I do hereby declare that the following is a full, clear, and exact description of thesame.

IO My invention has reference to the construction and arrangement of dies set face to face and arranged to act in suitably-situated planes, between which dies, by placing and rolling steel or other metallic round bars, they will have im- I 5 parted to them the spiral or helicoidal twisted formation required for (so called) pods of angers, and which may also be employed in imparting such configuration to other tools and articles requiring the same.

In the drawings'herennto annexed similar letters of reference indicate like parts.

Figure 1 is a diagram showing myimproved dies as arranged in connection with an ordinary power-press. Fig. 2 is a front elevation 2 of one of the dies on a larger scale than that in Fig. 1. Fig. 3 is a section of'a pair of dies, taken as at line 00, Fig. 2, and showing the cross-section of a bar being rolled by them. Fig. 4 is a section of the dies, taken on line x,

Fig. 3, and showing in connection therewith the longitudinal section of a bar being rolled thereby. Fig. 5 is a diagram showing plane in which the tops of the ribs B are situated, and also sections on lines x 00*, Fig. 2.

3 5 Letters A A- are two dies, each of which is provided with diagonal parallel ridges B, the size and shape of which will be governed by the fineness or coarseness of the twist to be imparted to the bar to be'aoted upon. The shape 4c of the ridges may be also varied, but as shown in cross-section, Fig. 4, they are nearly semicylindrical.

In Fig. 2 the line :0 may not only be taken to be the line upon which the sections, Fig. 3, are taken, but also the line of direction in which'the dies A stand and operate in relation.

to each other. The angle at which the ridges B are situated with regard to the line or will be governed by the pitch of the twist de-- sired.

Fand G are marginal surfaces of the dies A. These, as shown, are slightly inclined, but, if desired, may be made parallel to give a cylindrical neck, K, instead of a conical, as shown; They are arranged so that a piece of 5 metal, H, is left on theend of the pod I suit able for forming thescrew at the end thereof, while the margins F are arranged for forming the beginning of the neck'K, the completion of which and theformation ofa square end or eye at the extremity (does not form" any part of my present invention) may be accomplished by rolls or by hand-work, Ste, in any ordinary manner after the pod has been formed, as also the part H into a screw.

The dies A are set face to face, preferably .formed and set'so that their faces from 2 to 3,

Fig. 5, will be parallel planes. From 3 to 4; the faces fall away at a gentle incline, and from 4 to 5 at a more abrupt incline or curve. By, this arrangement the bars to be'acted upon can be freely entered, as at L, and easily rolled, and will come out from between the dies at M.

I would explain that if the bars are'of steel or'iron the rolling is done hot, and that it will produce but very little, if any, lengthening effect upon the bars, that the bars should be about one-fifth part larger in diameter than the distance between the dies A in their parallel parts from 2 to 3, measuring from the top 'of the ridges of the one die to those of the other; but this amount willhave to be varied according to circumstances, size of pod, and thickness of twist. The ridges B on both dies A are at an equal 8 5 angle to the line 00, Fig. 2, but when face to, face are at opposite inclinations, as indicated by the line Fig. 5 may also be taken to be a longitudinal section or sections of the die A, taken on either of the lines w or x. 0

0 represents a portion of the bed, and D the movable follower, of an ordinary powerpress. E are two ordinary rests or carriers, attached one on each. To these are secured the dies A, Fig. 1. The follower D will be 5 arranged to movethe dieA therennto attached down to'about the position marked 1.

Many other means than a power-press may be employed to cause the dies A. to operate to= gethernpon a bar to form the pod I, as above we described; but the said means do not form any part of my present invention.

The diesAmaybe made without one or both of the margins F or G.

What I claim is as follows:

1. The combination of the dies A, each having diagonal parallel ridges B, arranged face to face, and caused to reciprocate and to act in parallel planes upon the metal placed between them, substantially as described.

2. The combination of the dies A, each having diagonal parallel ridges B and a margin, F, arranged face to face, and caused to reciprocate and to act in parallel planes upon the metal placed between them, substantially as described.

ANDREW LAUNDRY.

Witnesses:

CHARLEs G. G. SIMPSON, GEO. R; LIGHTHALL. 

